Electric chain-welding machine.



c. L. HOPE. ELECTRIC CHAIN WELDING MACHINE.

APPLICATION FILED H0120, 1908. 978 51 60 Patented Dec. 13;;1-910.

- wHnc/soeo C. L. HOFF.

ELECTRIC CHAIN WELDING MACHINE.

APPLICATION FILED NOV. 20, 1908.

Patented Dec. 13, 1910.

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m. 4 MM 0. I1. HOPE. ELECTRIC CHAIN WELDING MACHINE. nw'mouxox rxnnnnov. no, 1900.

978,160. Patented 1m 13, 1910.

. 4 BETH-SHEET a.

Wilma c. L. norr. MIG 0mm WELDING KAOHIHE.

APPLIOAIIOI FILED IOV. 20, 1008.

PatenmdfDea 13, 1910.

witnmo I Y UNITED sTATEs PATENT OFFICE.

CABL'I'ON.L; HOFF O1 YORK; A SSIGNOR T STANDARD CHAIN COM- PANY;OF'YOBK, PENNSYLVANIA; A CORPORATION OF PENNSYLVANIA To all whom it myconcemn Be it known'that I. Cannon L. Horn. of York, York.county,-Pennsylvania, have in-- ,vented certain new and useful Improve-":ments in Electric Chain-Welding Machines;

and I do hereby declare the following to be a full,-clear, and exactdescription of the same, reference being had to the accompany- ..ingdrawings, forming a part of this speci-,

fication, and to the figures and letters 0 reference marked thereon.

One of the objects of the present invention is to provide a'machine withwhich the current losses due to short circuiting and prove and simplifythe mechanism including the arrangement of the electrodes and linkhandling'm'ea'ns whereby more uniform and certain results are securedand a-higher welding rate may be maintained.

. The invention consists primarily in a welding machine having so itselectrodes mounted in fixed position with. relation to each other andtolthe transformer, and providedwith suitable mechanicallmeans forhandling thelinks .and presenting'the same to and withdrawing the samefrom the elecgtrodes, the links. themselves, when desired,

constituting the means for controlling. or

.be now described andv ointed out'p articus p shownclearly. 1n Fig. 4.The electrode cartion,

establishing and'breaking the welding cir cuit.

Theinvention further consists in certain novel details of constructionand combinations and arrangements of parts all as will larly in theappended c aims. v

In the accompanying drawings: F1gure'1 vis'a top plan view of a machineembodfying,

the present invention. Fig.2?is' a out: elevation of the same- Fig. 3 1sa SQCUOIL showing the dies and jaws in front elevation.

Fig. 4.- is a section taken in a central vertical Pplane from fronttorear, the transformer being in elevation. Figs. 5 and 6 are detailsectional plan views of the electrodes and jaws,- Fig. 6 showing a linkin welding posland Fig. '5 showing a link in the position it occupieswhen first inserted and-when ii ELECTRIC CHAIN-WELDING- MACHINE.

spe ciilcation of Letters Patent. -i ,a neation filed November 20, 1908.Seria1 No. 463,621.

present improvements is provided with a will beat a height convenientfor the oper- .accommodate links of difierent size, to take -ings, andare heldby clamps B in dovetail recesses in thevertical faces of fixedelectrode carriers 13 which formthe ter- .minals. o f-the secondary B orthe trans {former B;

Patented Dec. 13, 1910.

' being subjected to the action of the dies.

Fig. 7 is a horizontal section through the upper die. Figs. 8 and 9 areface views, respectively, of the upper and lower dies. Fig. 10 is a planview of theinner end of the link support and guide. Fig. ll is asectional elevation of the dies and one of the jaws on an enlargedscale. Fig- 12 is an elevation of the carriage retractingcam and lever.Y

Similar letters of reference indicate'like parts in all the views.

The machine illustratedin the accompanying drawings and which embodiesthe bed plate A, upon which the various parts of the machine aremounted, the said bed plate being itself supported on legsA of suchlength that. the dies, electrodes, etc.,

ator to present the links thereto. In the machines as constructed up tothe present time the: operator sits in front of the machindlalthou'ghitwill be understood that the bed plate may be elevated to a sufiicientheight for the operator to stand while operatingthe machine. v g

The electrodes forming the terminals of .the welding circuit are mountedin fixed position, but are preferably ad'ustable to up we'ar on theircontact surfaces and to permit of'ready removal and renewal. The said'electrodes are lettered B in the draw- The transformer isconvenientlysecured to the under side-oftlie bed palateby bolts 6;,while theelectrode carriers "p roject above the said bed l t as riersare preferably hollow and provided- .with pipe-connections b for thecirculation .1 of water or other cooling medium through the same,whereby excessive heating of the carriers or'electrodes is prevented.

riage C is provided with upwardly extending'hrackets C'-'in whichtransverse ways are -formed .for the reception of transversely 1'novable jaw carriers C Link gripping jaws between which the link is grippedand held during both its presentation to the. electrodes, as shown inFig. 6, and'durmg its presentation to the dies, as shown'in Fig. 5, aremounted on the carriers C For convenience in presentmg'the link inposition to be gripped by the jaws, the jaws whi sup'gort or rest uponwhich the forward end 15 of e are provided-with extensions '0 Fig. .3,

are at all .timesin position to form a link ma. be placed, while therearor outer end of t e link is adapted 'to be carriedby a linksupportand guide E, adjust-' "ably heldfon the carriage by a bolt E andv havmgla seat e in which the operator may lacetheouter end of the 'linkwhen the atterlis presentedin position to be grasped by. the aws c'u'I'nasmuch as the links are intended to be open at one end prior to theirpresentation to the-machine, the seat .6 is of tapered form, aswellillustrated in F i 5 and 6, the closing of the jaws on the' ink thusserving not only to grip and hold the link in position'for presentation'tothe elec trodes and dies, but also serving to close the link,--the'reby bringing the open ends of the sa'me firmly together, or-inproper con- .tact'ielation to insure the 'heating'pf the ,aids of'thelink when the ends are seated between and bridge the opening between theelectrodes.

Obviously, the jaws may be forced toward each other, and the carriagemoved both toa ward and from the electrodes and pivotal-1y Jon'itsoenter so as to center the links by suitr 'able hand manipulation, butthe present machine is designed for a power operation in which all ofthe movements shalljbe effected automatically.

' The power mechanism preferably consists of a drive shaft F, having agear wheel F jou'rnaled thereon and receiving its motion -Withthis-arrangement, and in accordance "-Iwith theiwell understoodoperation of one-' from a pinion f and ulley f, a one-revolution clutchF contro led by'a clutchlever -Fand treadle F bein inter osed betweenthe gear wheel F an the rive shaft F.

revolution clutches the drive shaft F will be brought. to rest when ithas made a single revolution, and in order to again'inaugurate itsmovement the operator, by means of the treadle F withdraws the clutcharm F allowing the clutch tobecome effective, and the shaft is againarrested when it has made a single revolution. In each of its singlerevolutions, the shaft F is adapted rate the mechanism to withdraw thecarriage from.its positioniin proximity to 'the electrodes, cause thedies heretofore referred to to make an effective reciprocation,

open the link-gripping jaws, holding them open for a suitable period,and'then close said jaws and 'again permit the carriage toadvance, themechanism for accomlishingthese movements being as follows: or advancingand retracting the carriage a shaft G ournaled below the bed plate inproximity to its forward edge is provided with an arm G extending upthrough the bed plate and tnrn-table'into an openin gin the carriage,whereby when the sha t G is turned through a short angle the carriagewillbe moved in one direction or the other. downwardly extending arm Gon the shaft G is connected by adink G with the lower end of a carriageoperating lever G, centrally jo'urnaled in a bearing g on the' bed plateand having a. roller G at its lzpper end adapted to bear on a disk orcam. 1

drive shaft. The said disk G. is provided on the with a recess a intowhich the'roller on the.

carriage operatin lever passes and in which it remains while t c saidshaft is stationary, G connected with 'the lever G at Queen and with theframe at the opposite end becomes efiective to adat which time a s'privance the carriage and force the link held thereby into contact with theelectrodes.

Angle levers H are journaledin the outer ends of the upwardly extendingbrackets C of the carriage, one arm h of each lever being connected by alink h with the said j aw carriers C and forming with said links, togglear'mswhich, when brought down to the position indicated in Fig. 2, andin dotted lines in Fig. 3, will cause the said carriers and jaws toadvance toward each other. The upper ends of theangle levers H areconnectedby a' 5 ring I, the tension of which may be adjuste through theconnections 1'' with the levers, said spring 0 to turn the levers in adirection to: Vance the jaws toward each other. The extent of suchadvance movement is limited by adjustable stops I, preferabl in the formof at screws extending vertical y in the brackets and into position forthe toggle arms to oontact therewith, whereby their downward swingingmovement is arrested.

The lower ends or arms of the angle levers H are provided with rollers Hextending substantially parallel with the lineefiective to hold thelink' gripping jaws 'closed.' when the'carriage' has been re r tractedand after the'dies have acted to give shape-to the weld, the arms K aremoved' toward-each other, thereby. opening the jaws, whiohgaws areheldo'pefi for a period 1 y aws-: iwu e i cl uutlerthe-lnflunoeof-the'sprin 'I and. theycarriaggtogethar with'the new mkyis'f advancedto the indicated: in'IF-ig. i. e .,".w1 thj the forward-end ofthe link"seated firmly aga nstgapdub j i;h m b i;

a to permit the opfifl-thdl'aw' i welded link .imd' laee another' l nk-1n pouftion to .begripped' tween said" to the ."general cross section-ofthe rema ning port-ion of: .the link, vertically reciprocating dlesand Mare provided-afar actin "1.6mm. when "the same. has been with an theelectrodes l-bind-ajust n-ior-- to theopening of the] jaws; Thc dies LandxM arefmountedin vertically nmv able for --the es lide' M beingformed inffa bracket" slides Le na. Mi,- thexways for. the slide .L

being formed-in a bridge- L, and, the ways;

the bed:'-plate' of the The 'n'pper'die slide is open ated by, aicrank'arm Z carried'by-a rock shaft 'lflhavi-ng at its rear end acrank arm l-adapted to cooperate, with a canal on the drivesh'aft'F, The lower dieslide M is op erated .by' a crank. lever 71 connected by a'link m and ac'rajnkhr'm m? on a' ro'ck shaft ,mficarrying at itsi rea r 'end a crankarm m L I adaptedjto cooperate with a cam-l correspondinginshape to thecam l. The cams,

l,-l?..are'.rigidly ,mounted' on the shaft F,

j and'gare timed to cause the dies'to advance simultaneously with aquick motion, immediately afterthe link and carriage have been withdrawnto the position i indicated in Fig. 4,. and to 'immediately recede,,leaving the.

link free forlremoval as soon :as the jaws haveopened; The dies Land Mwhich give -to the {weld are" preferably cut away.

shap onte forward side,'as shownclearly 1n F g.

.11, inorder toalford spacefor the gripping jaws cFata point inproximity to the end of thelink, and the operating faces of the .d-iesare preferablyformed-so as to shear "off any surplu's metal, therebydispensing with. the. necessity of subsequently trimming the ;-weld.This result is. preferablysecured 'by' causing one of the dies to'entertheother,

for instance, -the upper .die L'may be formed with a curvedlinkreceiving'recess N, Figs.

7. and 8, land the lowerdie M is formed with I curved-projection Madapted to enter the t -'.f c onvenientlyithe contact faces oftheelectrodes B maybe recessed for the reception ofthe ends of the link;although,-1f not recessed,- practice has demonstrated. the fact ivisi 1desirable t0- .g1 ve$.;tl}eweld, afshape-which' that the said faceswill-quickly wear'until the "ends" of-th'e link will seat firmly thereinand'becentered trode. Q I In Operation, the links S which are usuallyformed on a suitable machine and -with one end" open so that successivelinks 3 the-operator during the period whenthe carrated position, theprojections .0 form positioningiirests for-the, forward end of the rest'fori-thevrear orouterend of the link. The driveshaft F being in motionwhen a the closingof the jaws on the link, thereby f0rc1ng the two endsof the link together the carriage. Ihe operator may now release his holdon the link, if he has not previously done so, and'th'e subsequentmovetothe action of the'spring G. The shape of the cam G is such thatthe forward end of. the link will strike the electrodes with a .on aturn-table, the link and carriage are "free tqlswinglaterally or to asufiicient ex-' tent to insurethe' centering of the end of .more,inasmuch as the link is onlyjin contact with the electrodes during theactual heatingperiod, the electrodes and link constitute utilized inlieu of a mechanically operated switch, although, if so desired, anautomatic employed and operated from the drive shaft "F; Such a switchis shown at O 'inIFig. l and is of awell known type forming no part ofthe present invention. To insure a uniform advance of'the-jaws, aconnection is movement ofthe shaft only after he has determined byobservation that the ends of the link have reached a welding point.- Ob.

. viously, t'he time' -required torany particular by the walls oftheelec-' triage is retracted-and-the jaws c? separated When the aws c arein their open 'Orsepa link, and the guide E forms a positioning"Tlink-is placed in the position just described, .the first. succeedingmovement efi'ected is."

- firmly and gripping the link. in position onswitch of well knownconstruction may bepreferably provided between the jaw' oper-. 1 atingmechanisms and this connection may- F? and the operatoragain'inauguratesthe' I naybe. hooked together, or passed one with-f. 1nthe other, are presented one at a time. by.

ment of-the machine-will cause the carriage 'to' advance w thconsiderable pressure, due

blow-of considerable force, thereby insuring a'perf'ect contact with theelectrodes. .Owing to the fact that the carriage is, mounted' loo = thelink between the electrodes, and,furtheran efiicient current controllerwhich may be link to reach a welding heat will depend upon variousconditions, such, for instance, as the strength of the current, theperfection and area of the contact surface, and the cross section andconductivity of the end of the link itself, but, regardless of thevariation in time due to these causes, there is only'a negligiblecurrent loss due to the branching of the circuit through the link itselfand through the parts of the machine in contact with the link, owingto'the fact that such branch circuits are relatively long andofrelatively high resistance. When the movement of the drive shaft isagain inaugurated by the operator withdrawing the holding lever of theone-revolution clutch, the first movement causes the carriage to bewithdrawn or retracted through the operation of the cam Gr acting on thelever G, and immediately after the carriage has been withdrawn orretracted the dies are caused to advance by the cams 1*, Z acting on thecrank arms Z and m The dies make a quick forward stroke, immediatelyreturning. to their, separatedposition and this is immediately followedby the opening of the jaws 0 through the operation of the cams K therebyfreeing the, welded link which may be removed by tlieoperator and a newone inserted before the jaws again close and the carriage advances topresent the link to the electrodes. i

What I claim as new and desire to secure by Letters Patent, is:

1. 'In an electric chain link welding machine, the combination with themovable carriage and link gripping jaws mounted on and movable with thecarriage, of the fixed welding electrodes constituting the circuitterminals, the link engaging faces of said electrodes being formed intoa converging seat for centering and pressing the ends of the'linktogether when advanced by the carriage. i

2. In an electric chain link welding niachine the combination with theterminal electrodes forming a seat between them for the end of a link,of gripping jaws for the link movable bodily toward and from theelectrodes and pivotally mounted on an axis to swing transverselywhereby the end of the link may be centered between the electrodes 3. Inan electriechain link welding machine the' combination with the terminalelectrodes forming a seat between them" for the end of a link, ofgripping jaws for the link, a carriage on which the jaws are mounted,movable toward and from the electrodes and a pivotal support for thecarriage whereby the carriage and jaws may be turned to center the linkbetween the electrodes.

4:. In an electric chain link welding nac'hine, the combination with theterminal electrodes forming a seat between them for the end of a link,of a carriage movable ward and from the electrodesaa guidingsup- 1 portfor the rear end of the link and gripping jaws for the forward end ofthe link mounted on and movable with the carriage.

5. In an electric chain welding machine, 7

,in unison toward and from the electrodes,

each of said jaws having a projection on the under side, forming asupport for a link and a support for the rear end of the link.

7. In an electric chain 'link welding machine, the combination with thefixed terminal electrodes and the reciprocatory dies in front of saidelectrodes, of a reciprocatory link gripping'and carrying mechanism for,

presenting a link to the electrodes and su sequently transferring thesame to the 8. In an electric chain link welding machine, thecombination with tl e fixed terminal electrodes and the reciprocatory'dies in front of said electrodes, of a reciproeatory link gripping andcarrying mechanism for presenting a link to the electrodes and diessuccessively and an operatinginechanisui for the dies, timed toreciprocate the dies when a link has been withdrawn from' the electrodesby its gripping and carrying mechanism.

9. In an electric chain link welding machine, the combination with thefixed tering in line with the minal electrodes and the reeiprocatory,dies located in front of said clectrodes,of a link carrying carriage, acam for imparting an intermittent movement to the carriage fortransferring a link from one position to having terminal weldingelectrodes-rigidly connected therewith, and reciprocatory dies forgiving shape to the weld, of a recipro catory transferring mechanism fortransferring a link' from the electrodes to the dies and operatingmechanisms for alternately moving the transferring mechanism and dies. I

11; In an electric chain link welding'maa chine the combination withfixed electrode supports and a transformer with WlllClli 'Sflldsupports. are rigidly connected, of Weldingelectrodes mounted in saidsupports and adjustable toward and from each other, means for holdingsaid electrodes in adjusted position whereby an adjusted link seat isformed -close the jaws, anadjustablestops for iting such closingmovement.

between their proximate ends and a link carrying carriage movable towardand from I said seat;

12. In'an electric chain link-welding machine, the combination with thefixed-welding electrodes forming a seat between them for the end of. a.link,vand a'carriage mounted in ways to move toward andjrom theelectrodes,- of'transversely movable link grasping jaws mounted in wayson the carriage, toggle arms for moving said jaws ended-- justable stopsfor limiting suchclosing move- I ing jaws mounted in ways on thecarriage] toggle arms for moving the jaws, a spring for moving the togle arms in a direction to machine,-the combination with the fixedweldg"ing' electrodes-forming a seat, between themfor the end of}; link, and alink carriage mounted in ways to move toward and-from 14;. In anelectric chain link welding said electrodes, oftransversely movable.

lim

' "opening theqawsagainst the tension of thegrasping jaws mounted on thecarriage levers on the carriage for operatlng-sald Jaws,

mgs, an cooperating with the levers on the carriagej toi'open the 'jawsand a spring for closi l the jaws. r, 15. n an electric chain linkwelding' ma ing. electrodes forming between them a Seat for the end ofthe link, of'a link'oarrying carriage movable toward and from theelectrodes, a' spring for'moving thecarriage toward the electrodes, andmeans. for retra't ing the carriage against the tensionof the spring. JI

7 16. In an electric chain link Welding machine,"the combination withthefixed weld? ingelectrodes'formingbetween them a. seat .for the end ofthe link, of'n spring pressed trodes, spring pressedjlink grasping jawsmovably mounted on thecarriag'e, andmeans for retracting the carriageand'means, for

jaw closing spring. H I

I CARLTON Horn-i Witnesses; v 4

11.0. BRENNEMAN, -A. J.'BRENNEL IAN,

chine, the-combination with'the fined weld- "carriage movable toward andfrom the. elecpower ogerated levers mounted in fixed bear-f

